Bart Van Assche 7083abbbfc dm mpath: avoid that path removal can trigger an infinite loop ...

If blk_get_request() fails, check whether the failure is due to a path
being removed.  If that is the case, fail the path by triggering a call
to fail_path().  This avoids that the following scenario can be
encountered while removing paths:
* CPU usage of a kworker thread jumps to 100%.
* Removing the DM device becomes impossible.

Delay requeueing if blk_get_request() returns -EBUSY or -EWOULDBLOCK,
and the queue is not dying, because in these cases immediate requeuing
is inappropriate.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

2017-04-27 17:04:27 -04:00

..

bcache

sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>

2017-03-02 08:42:38 +01:00

persistent-data

dm btree: fix for dm_btree_find_lowest_key()

2017-04-24 14:47:49 -04:00

bitmap.c

…

bitmap.h

…

dm-bio-prison-v1.c

dm bio prison v2: new interface for the bio prison

2017-03-07 11:30:16 -05:00

dm-bio-prison-v1.h

dm bio prison v2: new interface for the bio prison

2017-03-07 11:30:16 -05:00

dm-bio-prison-v2.c

dm bio prison v2: new interface for the bio prison

2017-03-07 11:30:16 -05:00

dm-bio-prison-v2.h

dm bio prison v2: new interface for the bio prison

2017-03-07 11:30:16 -05:00

dm-bio-record.h

…

dm-bufio.c

dm bufio: add sector start offset to dm-bufio interface

2017-03-07 13:28:33 -05:00

dm-bufio.h

dm bufio: add sector start offset to dm-bufio interface

2017-03-07 13:28:33 -05:00

dm-builtin.c

…

dm-cache-background-tracker.c

dm cache: significant rework to leverage dm-bio-prison-v2

2017-03-07 13:28:31 -05:00

dm-cache-background-tracker.h

dm cache: significant rework to leverage dm-bio-prison-v2

2017-03-07 13:28:31 -05:00

dm-cache-block-types.h

…

dm-cache-metadata.c

dm cache metadata: use cursor api in blocks_are_clean_separate_dirty()

2017-02-16 13:12:51 -05:00

dm-cache-metadata.h

dm cache: significant rework to leverage dm-bio-prison-v2

2017-03-07 13:28:31 -05:00

dm-cache-policy-internal.h

dm cache: significant rework to leverage dm-bio-prison-v2

2017-03-07 13:28:31 -05:00

dm-cache-policy-smq.c

dm cache policy smq: make the cleaner policy write-back more aggressively

2017-03-31 11:41:05 -04:00

dm-cache-policy.c

…

dm-cache-policy.h

dm cache: significant rework to leverage dm-bio-prison-v2

2017-03-07 13:28:31 -05:00

dm-cache-target.c

dm cache: set/clear the cache core's dirty_bitset when loading mappings

2017-03-31 11:33:44 -04:00

dm-core.h

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dm-crypt.c

dm crypt: replace custom implementation of hex2bin()

2017-04-27 12:08:31 -04:00

dm-delay.c

dm: mark targets that pass integrity data

2017-04-24 12:04:32 -04:00

dm-era-target.c

dm era: save spacemap metadata root after the pre-commit

2017-04-24 15:02:14 -04:00

dm-exception-store.c

…

dm-exception-store.h

…

dm-flakey.c

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dm-integrity.c

dm integrity: use previously calculated log2 of sectors_per_block

2017-04-27 12:16:32 -04:00

dm-io.c

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dm-ioctl.c

dm ioctl: prevent stack leak in dm ioctl call

2017-04-27 13:55:13 -04:00

dm-kcopyd.c

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dm-linear.c

dm: mark targets that pass integrity data

2017-04-24 12:04:32 -04:00

dm-log-userspace-base.c

…

dm-log-userspace-transfer.c

…

dm-log-userspace-transfer.h

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dm-log-writes.c

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dm-log.c

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dm-mpath.c

dm mpath: avoid that path removal can trigger an infinite loop

2017-04-27 17:04:27 -04:00

dm-mpath.h

…

dm-path-selector.c

…

dm-path-selector.h

…

dm-queue-length.c

…

dm-raid1.c

…

dm-raid.c

dm raid: add raid4/5/6 journal write-back support via journal_mode option

2017-03-27 12:08:07 -04:00

dm-region-hash.c

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dm-round-robin.c

dm round robin: revert "use percpu 'repeat_count' and 'current_path'"

2017-02-17 00:54:09 -05:00

dm-rq.c

dm mpath: requeue after a small delay if blk_get_request() fails

2017-04-24 15:06:19 -04:00

dm-rq.h

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dm-service-time.c

…

dm-snap-persistent.c

…

dm-snap-transient.c

…

dm-snap.c

…

dm-stats.c

dm stats: fix a leaked s->histogram_boundaries array

2017-02-16 14:17:07 -05:00

dm-stats.h

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dm-stripe.c

dm: mark targets that pass integrity data

2017-04-24 12:04:32 -04:00

dm-switch.c

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dm-sysfs.c

…

dm-table.c

dm: mark targets that pass integrity data

2017-04-24 12:04:32 -04:00

dm-target.c

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dm-thin-metadata.c

…

dm-thin-metadata.h

…

dm-thin.c

dm thin: fix a memory leak when passing discard bio down

2017-04-24 14:58:10 -04:00

dm-uevent.c

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dm-uevent.h

…

dm-verity-fec.c

dm verity: switch to using asynchronous hash crypto API

2017-04-24 15:37:04 -04:00

dm-verity-fec.h

…

dm-verity-target.c

dm verity: switch to using asynchronous hash crypto API

2017-04-24 15:37:04 -04:00

dm-verity.h

dm verity: switch to using asynchronous hash crypto API

2017-04-24 15:37:04 -04:00

dm-zero.c

…

dm.c

dm: mark targets that pass integrity data

2017-04-24 12:04:32 -04:00

dm.h

…

faulty.c

md: fast clone bio in bio_clone_mddev()

2017-02-15 11:24:54 -08:00

Kconfig

dm raid: select the Kconfig option CONFIG_MD_RAID0

2017-03-30 11:17:08 -04:00

linear.c

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

2017-02-24 14:42:19 -08:00

linear.h

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Makefile

dm: add integrity target

2017-03-24 15:49:07 -04:00

md-cluster.c

…

md-cluster.h

…

md.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

md.h

md: fast clone bio in bio_clone_mddev()

2017-02-15 11:24:54 -08:00

multipath.c

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

2017-02-24 14:42:19 -08:00

multipath.h

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raid0.c

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

2017-02-24 14:42:19 -08:00

raid0.h

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raid1.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

raid1.h

RAID1: avoid unnecessary spin locks in I/O barrier code

2017-02-19 22:04:25 -08:00

raid5-cache.c

md: add raid4/5/6 journal mode switching API

2017-03-27 11:13:47 -04:00

raid5.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>

2017-03-02 08:42:29 +01:00

raid5.h

md: add raid4/5/6 journal mode switching API

2017-03-27 11:13:47 -04:00

raid10.c

Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md

2017-02-24 14:42:19 -08:00

raid10.h

…